Dr Hahnz Dog Food
Dr Hahnz Petfood made my Golden Retriever sick

I purchased a bag of Dr Hahnz Signature Range petfood from a Checkers Hyper store.
My Golden Retriever was fed the the food, and began throwing up about an hour later.
I changed the food to his normal food, and he was fine.
I again fed him some of the Dr Hahnz Signature Range petfood a few days later. About an hour later, he began throwing up again.
I tried calling Gourmet Pet Industries, but he phone number was not available.
I went onto their website, and logged my complaint, twice, still no response.
The bag also has no Expiry Date, Batch No: and Best Before dates.